Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '864b8e9b8056b51f19602d8fee653bdd0c7115e4e29c219cb5c6d15cb92f44ab' 
  AND token = 'LYUx2hybOIdma8/2v5Z8/J2ImBADVRnfuRTsjJjWWrQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}